The 6 Best jewel testers (2023 reviews)

The hmkis jewel tester is long-lasting, rigid and fits well with your regular usage like a dream. It is a kind of diamond and can be distinguished. It can be distinguished, the hardness of jade and diamond of different materials is different, and the equipment can be distinguished. It is easy to use and comes complete with understandable instructions and guides for every gem and size. You will love the fact it actually comes with its kit, cover cases, a battery, and a lil Flashlight/UVLight Microscope. If even slightly tilted, it will give no reading or alert as diamond.

This diamond tester is a great deal with the jewler scope and rechargable 9v included. It can tell you if a stone is a real diamond or not. It is definitely a must have if you buy diamonds or moissanite online & don’t want to get scammed.

Why We Like This:

Comes with a detector for currency
Easy-peas for someone who is not a jeweler to test their diamonds
Great and reliable source of authentification
Come in a cardboard storage box for extra protection

Best Runner up: Hqdz jewel Tester

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The latest hqdz jewel tester is an absolute beast in terms of its features, and rightfully takes the top spot with ease. There’s a bar of LED that lights up if it’s a real diamond and it beeps. It includes 1 standard 9v battery, which is super easy to use and the battery. The tester is relying on thermal conductivity and both diamonds and metal conduct heat similarly. The test takes a few minutes, please turn off the power after the test is complete.

It is great for testing watch crystals. It is very easy to use and 100% accurate. There’s other kits for gold, but they usually contain a series of individually bottled testing acids, testing needle, and stone.

Why We Like This:

Great tool to have if you own any jewelry
Diamonds are tested either thermally or electrically
Great tester to verify real or not real

Best For price: Dupeakya jewel Tester

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Next on the list, we've got yet another tester that manages to win our hearts. It's the dupeakya jewel tester and it's widely considered as one of the best convenient tester you can buy. It can distinguish ALL authentic gemstones from, say glass or cubic zirconias. The tester uses heat conduction because the speed of heat conductance is proportional to the hardness of the stone. It is used for testing sapphire, ruby, crystal, agate and other stones. The device needs to be restarted after a few minutes of use to be recalibrated.

This device can also test ruby, sapphire, emerald, topaz, etc. The tester differentiates between natural crystals and man made crystals "synthetic" like CZ's. It detects diamonds well if you follow the instructions.

Why We Like This:

A must for someone who has jewelry
Simple devise to help quickly determine authenticity of stone
Highly recommended for anyone who cannot afford to be fooled

Best For Testing: Presidium gemstone Tester

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Presidium line of tester come in a pretty wide variety of styles, so you can definitely find one that suits your individual preferences and needs. It is great to distinguish glass from gemstones, however if the stone is too small in a piece of jewelry, the tester will normally hit the side and not register. It will tell you what the hardness is, based on the MOHS scale, and then on the machine it lists the most common stones like garnets, quartz, and diamonds. The probe with the fine tip allows testing on very small colored stones set in jewelry. It has a small soft carrying case with zippers. There is an opening under the device that holds two AA size batteries. It will smell like burnt plastic if fake or stabilized with a plastic substance. It has an opening under the device that holds two AA size batteries. It is good for testing gemstones, however if the stone is too small in a piece of jewelry, the tester will normally hit the side and not register. It's a keeper for any serious collector and/or reseller.

Why We Like This:

Good for differentiating diamonds and few other gemstones
A must have for jewelry collectors
Regularly clean the pen tip by drawing lightly in circles on paper

Best Accuracy: Hqdz-Td jewel Tester

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The hqdz-td jewel tester is suitable and reliable and fits well with your daily usage. The Diamond tester pen and 60x led lighted loupe combo is a must have tool kit when you are going to a garage sale, flea market, swap meet, etc. It makes it super simple by making a beep and lighting up to tell you that it is real. If the stone tested is a diamond, the led lights will light up as the stone passes each test conducted by the diamond detector. It comes with a 9v battery. There is a side pocket that holds the little metal piece that holds loose stones. It provides enough light at any dim conditions.

The pocket size is convenience to carry, so you can use it in everywhere and every time. It comes in a convenient case that is soft but the end protects the probe rom from getting damaged.

Why We Like This:

A must for someone who has jewelry
Emits audible sounds to easily differentiate the readings
Designed for gems, jewelry, coins, stamps, rocks, watches, hobbies, antiques, models, photos industry, etc

Best Easy To Use: Presidium jewel Tester

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The presidium jewel tester should be able to handle its purpose and duties with ease. It's easy to use and an absolute necessity for the diamond hunter. It comes with a cord that plugs in to Presidium Diamondmate-C and in to electricity. It comes with a matching adapter. The green light takes a while to light up before the instrument can be utilized. It's better built and will last longer.

The unit comes with one which can be recharged with the charger that comes with it. It's just for diamonds but if you get a little bit of red, then it's a natural stone, but the tester is not made to tell you what kind of stone.

Why We Like This:

Able to test smaller stones in really tight, recessed spaces easily
Good investment for long term